Improvement in thrashing-machines



` J. A. WOODWARDL 'THRESHING MACHINE.

No. 38'..779. Patented June 2,. 1863.

Inventor:

Wit n e'sses';

2 Sheets-@Sheet 2.

J. A. WOODWARD.

T'HRESHING MACHINE.

No. 38,779, Patented Junez, 1863.v

UNITED STATES PATENT OEEICE.

JOHN A. \VOOD\V ARD,`OF PLATTEVILLE, VISGON'SIN,

IMPROVEMENT IN TH FLASHING-MACHINES.

Specification forming part ot' Letters Patent No.f38,77|9, dated Julie 2, 1362i.

To all iohom it may concern:

Be it known that I, JOHN A. WoonWAED, of Platteville, in the countyy of Grant and Stateof Wisconsin, have invented a new and Improved Machine for Thrashin g Grain; and I do hereby declare that'th'e following` is a full, clear, and exact description'ot' the same, reference vhein g had to the accompanying drawings, making a part ot' this specification, in which- A Figure l is a side sectional view of my invention, taken in the line a', Fig. 3; Fig. 2, a side view of the same; Fig. 3, a section of the same, taken in the line w x, Fig. 2.

Similar letters of referenceindicate corresponding parts in the several figures.

The object ofi this'invention is to obtain a machine of simple construction by which grain may be thrashed and separated from impurities at one and the same operation, and at the same time. without allowing the dust and dirt being' expelled from the feed device or opening into the face of the attendant.

The invention consists in using, in combination with a tln-ashing-cylinder and slatted concave, a suction-spout, fan, spiral or screw feeder, and a screen, arranged in such a manner as to ett'ect the desired end.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.l

A represents a framing, in the upper part of which side pieces, (L a, are secured.

B is afthrashing-cylinder, which is placed transversely in the upper part of A, and di rectly over a'slatted concave, C, which is provided withteeth b. The cylinder B is also provided with teeth, but they are not shown in the drawings, as they 'are common to all thrashingecylinders.

D is an endless inclined slatted apron ,which works on rollers c c, placed between the side pieces, a c. lhis apron is directly'ovcr an inclined board, d, which is also placed and permanently secured between the side pieces, a a. At the lower end ot' the inclined board d there is a semicircular -recess or box, E, in which a screw, F, is placed. This screw serves as a grain-conveyer, and has its flange e sufficiently broad for that purpose. The screw F is (li-- rectly below the slattcd concave C, and it is somewhat longer than the thrashing-cylinder B, so as to Aproject through one of the side pieces a and adjoinv the vertical part j' of a suction-spout, Gr, the upper part, g, ot' which has a horizontal position andextends over a. box, H, which covers the upper part of the thrashing-cylinder. The partg ofthe suction. spout, which rests on the box H, .has an oblong slot, h, made in it, extending the wholewidth ot' the box, and the capacity ot' this slot may' be varied as desired, or entirely closed by means of a slide, I. `(Shown in Figs. l and' 3.)

J is a suction-fan, which is placed on the shaft K of the thrashng-cyliiuler B at the outer side of the framing A. (See Fig. .3.) The t'an is inclosed within a box', L, which communicates at its outer side with a pendent chamber, M, the latter con'nnunicating with the horizontal part g of the suction-spout G, and having a ilap, i, at its lower end. The lower part o' the fan-.bon L communicates with the external air, and the chamber M is provided with a partition-plated, which extends some distance down within said chamber.

N O are two screens, placed one over the other, ,as shown in Figs. 2 and 3. The upper screen, N, is coarser than the lower one, O, and said screen N is provided at itsidischarge end with a side spout, l. The screens N 0 are connected together, and they are suspended at the back end by a link, Q from the vertical partfof a suction-spout, G. rlhe front parts of said screensrest on a bar, It, one end of which is secured by a loose connection or pivot in the lower part ot' the framing A, and the opposite end provided with an upright framing, k, to which an upright bar, l, is attached, having an arm, m, tted on it and secured at any desired point by a pin, n. rIhe arm m has a rectangular slot, o, made in the under side, sothat it may be fitted over a piu, p, placed eccentrically in a pulley, q, at one end of the shaft K of the thrashing-cylinder. By this means the shake motion is given the screens N O.

In the upper part of the framing A, and directly in frontof the thrashing-cylinder B, there is a rotary straw-discharger, b, which is composed of a tlat board or plate hung on a central axis. The direction of the movement of the working part-s is indicated by the red arrows in Fig. 1, and motion is communicated to all'by the belts r s t, (shown in Figs. 2 and 3,) q being the driving-pulley. i

The operation is as follows: The grain is fed between the cylinder B and concave C on an `inclined feed-board, T, and is thrashed in passing between said cylinder and concave.

The grain passes down through the slatted' concaveC', and falls into the box E, from y whence'it is fed by the screw into the lower grain will', on account ot' theirgravity, lodge in the chamber M, and drop fromtime to time, as it accumulates, through flap 'a'. The chess v is indicated in blue. The grain passes from the lower end of the vertical part f of the blast-spout upon the screen N, and passes through said screen', while' the large foreign substances are discharged from the side spout, l. The grain does lnot pass through the screen O, it being too fine; but it admits cockie and fine seeds to pass through it, the sound cleansed grain being discharged from the. end ot' O. The sound grain is indicated in black, the cockle in green, and the coarse foreign substances in red.

The rotary straw-dischargers facilitate the passage of the straw from the. concave C upon the apron D, which discharges the straw from the machine.

The suction-spoutG,in consequence ot' communicating with the boXH over the thrashingcylinder, draws up the dust therefrom, which passes into the fan-box L with the other dust from the part j'. (See Fig. 3.) By this arrangement the dust is not, as hitherto, blown into the face of the attendant.

I do not claim separately any of the parts herein described, irrespective of their general arrangement and combination; but,

Having thus described my inventioinwhat IY claim as new, and desire to secure by Letters Patent, is'- '.lhe combination and arrangement of thc suction-spout G, fau J, screw F, and screens N 0, when applied to a thrashing-machine or arranged in relation with a thrashing-cylinder, B, and concave C, to operate' ccnjointly therewith, as and for thepurpose specitied.

J. A. WOODWARD.` Witnesses :l

J. W. REMEY, J ULIUs .A UGUsTmE. 

